I did a fresh install of Wheezy and setup my Pi's to connect with WPA, it works fine but after a while the wireless drops. Seems to be during wifi load aswell as well.

I have 2 identical Raspberry Pi setups with identical Wifi devices.

fenlig@Green ~ $ lsusb
Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Bus 001 Device 004: ID 148f:5370 Ralink Technology, Corp. RT5370 Wireless Adapter

I am using a 1000ma power supply and have tried a 2000ma which made no difference.

if i do a ifup it says its alread configured and a ifdown then a ifup fixes it.

fenlig@Green ~ $ ifconfig wlan0
wlan0     Link encap:Ethernet  HWaddr 00:87:30:23:20:78
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

Any ideas guys?

Thanks Fenlig


I struggled with exactly the same issue a few months ago. I have tried almost everything, super-ultra efficient power supplies as well. Dying of desperation I changed... USB power cable. Since then not a single problem appeared. The cords inside the original one were simply too thin to carry enough current.

P.S.: While searching the answer for my case, I run across plenty of power noise related threads. Be sure to check the whole setup in the different electrical environment.

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  • I hope thats not the case but I will have to give it a try. While I hunt for a new cable to try is there anyway I can find logs for wireless activity? – Simon Kay Jun 11 '14 at 17:31
  • Does dmesg give you any output on your wifi dongle? You can also check the /var/log/ directory, esp. files: deamon.log & kernel.log for any NetworkManager lines. – FJaskolski Jun 11 '14 at 18:37

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